题目

 ---- Would you please help me try this blouse on?    ---- ____, but I think it may be a little smaller on you.  A. That’s all right       B. With pleasure      C. Believe it or not      D. By no means 答案：BABCD是圆内接四边形，点M是CD的中点，对角线AC和BD相交于点P，过点P且与CD相切于点M的圆与AC和BD分别相交于点R和Q，点S在线段BD上，使得BS=DQ，过点S且与AB平行的直线交AC于点T，求证：AT=RC.